Photographic film or plate pack



- Au'gFZB, T928. 1 1,682,628

" NL RoMANowlcz El AL I PHOTOGRAPHIC FILM 0R PLATE PACK 9 Filed May 19, 1927 2 Sheets-Sheet 1 INVENTOR MAR/AN EOMAA/Ovv/CZ JOHA/VN QOMANO w/cz BY W" ATTORNEY 4 M. ROMANOWICZ ET AL PHOTOGBAPHIC FILM OR PLATE PACK Filed May 19, 1927 2 Sheets- Sheet 2 INVENTOR MAR/AN koMAA ow/ c2. JOHANN QUMANOWIC'Z ATTORNEY Patented Aug. 28, 19 28 f 1 UNITED STATES,

PATENT OFFICE.

mun BOMhNOWIGZ AND J'OHANN ROMANQWIGZ, OF VIENNA, AUSTRIA.

rrroroenarmo FILM on PLATE PACK.

Application filed May 19, 1927, Serial No. 192,314, and in Austria May 25, 1926.

g I Exchange packs of photographic plates have been proposed in which each rigid or flexible plate of glass, celluloid or any other suitable material is provided at its side remote from that exposed to light, that isto say its back side with abacking sheet, a pulling strip and a protecting sheet all. of which are attached to the front edge of the plate and are so arranged that the backing plate is located between the plateand the pulling strip, the latter between the backing sheet and the protecting sheet and the latter is in direct contact with the next lower plate.

llhe plates are superposed to form a pile the backing sheet and the pulling strip 0 the uppermost plate extendin downwards on the back side of the pile an then extending forwards below the backing sheet and pulling strip of the next lower plate and so on. The pulling strips project forwardsand outwards through a slot through which they may be pulled out, but the lower front.

' 1 ends of the backing sheets are prevented tosay by simply pulling the pulling stri "tween the plates already exchanged and a,

from moving forwards.

The protecting sheets have substantially the same size .as the plates. 1 Owing tmthis arrangementstheycan be exchanged, that is the uppermostplate of the pile -s move backwards, descends along the rear side of the pile and finally is pulled forwards be.-

" support forced upwards elastically for the rpile, the plates not sliding along each other or along the backing or pifotecting sheets and. not being exposed to in ury.

Theinvention relates to an arrangement of photographic plates of this type and has 1 for its v arrangement by reducing the size of the o ]ect to simplify and cheapen the backing sheets to substantially that of the plates, the j backing sheets not being any more required to follow the pulling strips. Afu rther object of the. invention is to enable the arrangement to be used also in case that the plates have to be actuated for exchanging not by pulling strip but in any other-manner say by a pusher. I, The essence of the invention consists in that the rotecting sheet of the uppermost plate is rectly cdnnected to or directly passes into the backing sheet of the plate next below at the rear edge of the latter. Preferably these two sheets are made in one piece bent around the rear edge-of the next o ver plate without being attached thereto.

If in this case pulling strips have to be used for exchanging purposes such pulling strips are secured to the front edge of the plates, the same as the protecting and backing sheets and are located between the backmg and protecting sheets of the individual plates and'extend from the front edge of each plate to its rear end, down the rear side of the pile and then again forwards to the pulling slot.

In the drawing a constructional form of the-invention is shown by way of example,

in which pulling strips are used.

F1g. 1s a diagrammatical verticalsection of a pile consisting of three superposed plates, Fig. 2 is a perspective view on a.

smaller scale of two plates of the pile drawn apart. h

Figs. 3 to 7 show various positiehs in exchanging two successive plates.

' To the front edges 2, 12, 22 of each-of the plates 1, 11, 21 respectively is secured a backing sheet 6, 16, 26 respectively in the example shown a pulling strip 4, 14, 24 respectively and a protectiri sheet 3, 13, 23

respectively, the backing an the protecting sheet of each plate are approximately of the same size as the plate itself and are made of a sufiiciently strong and flexible material impervious tovlight, ,for instance of black paper. According to the invention the protecting sheet 3, 13, 23 of each plate is di-. rectly connected to or passes. into the back- .ing sheet 16, 26 of-the next lower plate.

time is held out of contact with the-top face of the lower plate 11 by the protecting sheet 3 of such plate 1. But also the protesting-sheet 3 can neither slide along the bottom face 1 being secured to its front edge, nor along the top face of the next lower plate 11 because it rolls off this top face as is clearly seen from Figs. 3, 5 and 6. Then the plate descends-on the rear side of .95 Fig. 1, the pulling strip the pile and slips as the pull on the pulling strip 14 is continued below the pile support 31 and under the pulling strip 14 of the next. lower plate, plate 1 being folded over to its to face and spread out smoothly thereon wit out sliding on the top face of this plate, as is clear- 1y seen from Figs.- 3 and 4. If then the pulling strip 14 of the following plate is pulled the operation above described repeated as is seen from Figs. 4, 5 and 6 and 1f the late 11 slips'between the plate 1 and the p ling strip 24 of the next lower plate a loop 17, Fig. 6 is formed between the backing sheet 16 of the late v11 and the protecting sheet 3 of the p ate 1 just previously exchanged the backing sheet 16 being directly connected to the protecting sheet 3,

J such loop 17 is sufiicientl retained by the rear edge of the plate 1 or preventing the protecting sheet 3 from shifting along the top face of'the plate 1. It is simply the backing sheet 16 of the plate 11 that slides together with the latter and hence without slidin along the latter on the rotecting sheet of late 1, the protecting s eet 3- not being capa 1e of sliding on the "plate 1 (Fig. 6%. Finally the backing sheet 16 of the p ate 11 is folded down onthe protecting sheet 3 of the plate 1 as shown in Fig. 7. The same operation is repeated on exchangthe, followingplates.

in v

if desired, he backing sheet and the protecting sheet ofeach individual carrier may be'likewise made in one iece folded down on the front edge of suc carrier and attached to it the pulling strip being arranged between the protecting and the backing sheet. l T

The present arrangement of the plates therefore warrants a perfect protection against mechanically injuring the plates in exchanging no matter whether the coating sensitive to light is on the to or on.the bottom face. of the plates. is arrangement also prevents an undesirable access of light. The pulling strips shown in. the drawing are not a necessary element .ofthe present arran ment of the plates; the plates might otherwise.

The length of each protecting sheet plus that of the backing'sheet connected thereto must somewhat'exceed in length the double length of the plate because 'as shown in F g. 4 a r exc angi'ng 'a-plate the backing sheet of the next lower plate must pass round the rear side ofthe pile.

' What we claim is:

1. In a' ack of superposed photo J hie carriers 0 sensitized coatings the'co rhb ina the protecting sheet 3 of the backing sheet of such carrier being arra rear endof the backingl actuated by pushers or r the backing sheet of such carrier, such pull- Y natures.

eea'eals sheet attached to ing sheet and a protectin such carriers, the

the front edge ofeach 0 backing" sheet of each carrier being arranged between such carrier and-the protectin sheet of the same and on the same side thereof the rear end of the protecting sheet of-each carrier being connected to the rear end of the backing sheet of the next lower carrier.

2. In-a -ack carriers 0 sensitized coatings the'combmation of a plurality of such carriers, a backing sheet and a protecting sheet attached to the front edge of each of such carriers, the

backing sheet of each carrier being arof superposed photographic tion of a plurality of such carriers, '.a backranged .between such carrier and the pro-- 't'ectin sheet of the same and on the same side t ereof, the protecting sheet of each carrier and the backing sheet of the next lower carrier being integral with each other and meeting in a rear old.

3. In a pack of superposed photographic carriers of sensitized coatings the combination of a plurality of such carriers, a backing sheet and a protecting sheet inte al with and folded down on each other an .attached to the front edge of each of such carriers, the backing sheet of each carrier'being. arranged between such carrier and the protecting sheet of the same and on the same side thereof, the protecting sheet of each carrier and the backing sheet of the next lower carrier being integralwith each other and meetin I in a rear fold.

4. Ina ack 0 superposed photographic carriers 0 sensitized coatings the combmation of a plurality ofsuch carriers, a backing sheet and a protecting sheet attached to the frontedge of each of such carriers, the d between such carrier and the protecting sheet of the same and on the'same side thereof. The rearend of the protecting sheet of each carrier being connected to the sheet of the next u for each lower carrier anda ing stri carrier attached to t e front e ge thereof and interposed between the protecting and ing strip extending to the rear edge of it passing .down along the rear edges of the carriers below' the same and thenforwards MARIAN RoMANowIcz. JOHANN ROMANOWICZ. 

